Break pin



(NQ Modem y A. LINDGREN.

BREAK PIN APPLIANUE POR FLOWS.

No. 358,209E Patented Feb. 22, 1887.

UNITEDv STATES PATENT Ormes.

AUGUST LINDGREN, OF MOLINE, ILLINOIS, ASSIGNOR TO THE MOLINE PLOV COMPANY, OF SAME PLACE.

BREAK-PIN APPLIANCE FOR PLOWS.

SPECIFICATION forming part of Letters Patent No. 358,209, dated February 22, 188.7.

y Application filed December 7, 1885. Serial No. 184,944. (No model.)

To @ZZ whom 15 may concern:

Be it known that I, AUGUST LINDGREN, of Moline, in the county of Rock Island and State of Illinois, have invented certain Improvements in Break-Pin Appliances for Oultiva tors, of which the following isa specification. This invention relates to those machines in which a shovelcarrying shank pivoted to a standard or beam is maintained in position ro by apin of wood or equivalent material adapted to give way when the parts are subjected to excessive strains, so that the shovel and stand-I ard may swing backward and thus avoid breakage, which would otherwise occur.

At the present time beams of iron and steel having an I form in cross-section are coming into general use. It is the aim of my invention to provide for the convenient and practical application of the breakpin in connection with 2o beams of this character, the shape and size of which are such as to prevent the ordinary devices from being used to advantage.

Beams and shanks of steel and wrought-iron are of such small size in cross-section that large holes for the break-piu could not be used without unduly weakening the parts. Small breakpins could not be employed in connection with supporting devices of the ordinary character, for the reason that they will not afford sufficient support to hold the shovel when in action.

My invention is designed to permit the use of small holes and small breakpins, and at the same time to support the brake-pins in such manner that they will afford the necessary re- 3 5 sistance to the backward movement of the shovel.

W'ith this end in View it relates to an arrangement of parts under which it is necessary for the piu to break at a greater number of 4o points than usual, in order` to permit the yielding of the shovel.

Figure l is a perspective view of a shovel standard and shank with my improvements applied thereto, the parts being in an operative position. Fig. 2 is a perspective view of the parts with the shank thrown backward in the position which it assumes on the breakage of the pin. Fig. 3 is ahorizontal cross-section on the line x .fr of Fig. l. Fig. 4 is a cross-secnon on the une` y y of Fig. 1. Fig. 5 shows a 5g' section of the standard above the shank.

A represents the standard, which may be formed by bending the rear end of a metallic beam downward in the ordinary manner, or which may be constructed in a separate piecey and bolted or otherwise attached to a beam, as preferred. This standard is iianged longitudinally along its edges on both sides, or, in other words, is made of an I form in cross-section,whereby it is given great stiffness in pro- 5o portion to its weight.

B represents the shank by which the shovel is connected to the beam. This may be constructed of wrought or cast iron, as preferred, but is preferably made, as shown in the drawings, of a single bar of wrought-iron doubled or bent at its middle into a U form, in order that its upper ends may embrace the standard between them.

I prefer to construct the shank with a ange, 7o a, on the outer forward edge, as shown, but with fiat inner surfaces, that it may bear closely against the sides of the beam. Midway of its length, or thereabout, I attach the shank to the beam by means of a transverse metallic bolt or pivot, D. Through the upper ends of the shank and through the beam I form a transverse hole, designed to receive the wo oden break-pin E, by which the shank is held normally in its operative position. To opposite sides ofthe beam I secure plates F, the lower ends of which are bent outward in such manner as to overlap the upper ends of the shank and bear against the outer faces. These plates, which may be riveted, bolted, or otherwise attachcd, are also perforated to receive and support the two ends of the break-pin. It will be observed that under this construction the break-pin is supported at three points, both inside and outside of the shank, and that it re- 9o quires to be broken into five sections before the shank is permitted to yield. Vhen the pin is thus supported, it maybe made of much less diameter than when applied in the ordinary manner, with its ends unsupported outside of 9g the shank.

By reducing the size of thepin I am enabled to reduce the size of the hole inthe standard,

and thus to avoid that excessive weakening of the standards which would result from the employment of a large pin.

The essence of' my invention consists of the construction and arrangement of the parts to eicet the breaking or shearing of the pin at a number of points in its length, so that a pin of small diameter will afford a greater resistance than when it is sustained at the middle only.

It will be perceived that when a Ilanged standard is used the inner l'aees of the shank stand at a distance from the side faces of the beam, as represented in Fig.

Standards ordinarily constructed, with flat faces, permit the inner faces of the shank to lie snugly thereon, so that the pin may vary only by a direct shearing action. XVhen, however, ilanged standards are used, the shank is held away from the faces of the beam, as shown in Fig. 3, in position to break the pin more easily than in beams of ordinary forms. It is this fact which renders my improvement of peculiar value in connection with flanged standards, and which renders it important that the pin shall receive support at its ends.

It is to be understood that the shank may be made of any forni adapted to receive the lower end ot' the standard, and that the plates F may be of any form desired, provided only they are adapted to overlap the shank and engage the outer ends ofthe pin.

Having thus described my invention, what I claim ism l. In combination with the standard, the shank pivoted thereto, the break-pin, and the plates on the standard engaging the outer ends ofthe piu.

2. rlhe U-shaped shovel-shank having flat inner faces and the external fiange, a, along its forward edge, whereby it is adapted for use in connection with a flange and external pinsnpporting plates.

ln testimony whereof I hereunto set my hand, this 31st day of Getober, 1885, in the presence of two attcsting witnesses.

AUGUST LINDGREN.

\V i t nesses:

C. W. HUNT, A. S. CARSON., 

